New York Agricultural Experiment Station, 71 



N. free Fats (ether 

 Protein. Fiber. extract, extract). 



Ground flaxseed 91. GO. 55. 86. 



Buckwheat middlings 78. 35. 75. 85. 



Malt sprouts S3. 41. 67. 90. 



Glover hay 58. 54. 64. 55. 



Timothy hay 49. 53. 63. 57. 



Mixed hay 42. 49. 57. 54. 



Corn silage 57. 69. 75. 84. 



Alfalfa forage 67. 53. 78. 64. 



Oat-and-pea forage ; . 78 . 57 . 65 . 71 . 



Corn forage 52. 52. 75. 77. 



Mangels 83. 71. 95. 50. 



Orchard-grass hny 59. 60. 55. 54. 



Oat-and-pea hay 81. 57. 66. 74. 



Corn stover 36. 64. 58. 70. 



Sorghum forage 47 . 59. 74 . 74 . 



Rye forage 74. 83. 73. 67. 



Clover silage 48. 60. 70. 67. 



Beets and carrots 84. 80. 95. 77. 



As a basis for comparison, the normal rate of shrinkage in 

 millj; flow that would usually occur under an efficient average 

 unchanged ration was assumed to be, for every period of one-half 

 month, about 2 per ct. during the third month of lactation, about 

 2.5 per ct. during the fourth and fifth months, about 3 per ct. 

 during the sixth and seventh months, about 3.5 per ct. during 

 the eighth month and about 4 per ct. during the ninth and tenth 

 mouths. In making this estimate, data from this Station were 

 considered in connection with some from the Cornell Experi- 

 ment Station, and some records published a number of years 

 ago by Dr. Sturtevant. 



The amount fed was always about all that could apparently be 

 used by the animal. As a rule there was a gain in live weight 

 which indicates a usually sufficient amount of food. The cows 

 were mostly of medium size and less than 1,000 lbs. in weight. 

 The average weight per cow for all periods was 932 lbs. 



An idea of the prevailing composition of the rations and of 

 their efficiency is given by the following data: Under 1 is the 

 average from 90 individual records for one month with rations 

 having a fuel value of considerably less than 30,000 Cal., and 

 supplying less than 15.5 lbs. of total digestible organic matter. 



